Coffee-pot.



H. L. JOHNSTON.

COFFEE POT.

APPLICATION FILED DBO. 21, 1911.

Patented Sept. 23, 1913.

COLUMBIA PLANOGRAPH cm, wsnmmcw, u. c.

STATES PATENT @FFKCE.

HERBERT L. JOHNSTON, OF TROY, OHIO.

COFFEE-POT.

To all whom it may concern Be it known that I, HERBERT L. J OIINSTON, acitizen of the United States, and a resident of the city of Troy, in thecounty of Miami and State of Ohio, have invented certain new and usefulImprovements in Coffee- Pots, of which the following is a full, clear,and exact description, reference being had to the accompanying drawing,forming part of this specification.

My invention relates to improvements in coffee pots for making of dripcoffee, in which a cylindrical vessel is provided for the receipt of theground coffee and the boil ing water, in which after the coffee hassteeped for the required time, the vessel is then provided with a stripof cloth or other' suitable material across the top, and the vessel isthen inverted over the main body of the coffee pot, so as to form atight closure between the two parts and allow the coffee to drip intothe coffee pot.

In order to prevent loss of strength by exposure to the air during theprocess of making, it is quite important that the coffee and watershould be tightly sealed in the vessel, and as the coffee drips from thecontainer, it is essential to prevent the formation of a vacuum toinsure the effectual working of the device.

It is the special object of my invention to provide this necessary inletpassageway for the air when the container is inverted and held inposition onthe coffee pot so that there shall be no opening for leakageof the water before the container vessel is inverted.

My invention consists of the novel construction and arrangement of partsto be hereinafter particularly pointed out and claimed in which thisobject is attained automatically without the necessity for any valves orother closing devices.

In the drawing, Figure 1 is a side elevation partly in vertical sectionof my improved construction with the parts arranged for the dripping ofthe coffee into the pouring vessel. Fig. 2 is a side elevation of thecontainer for the coffee and water before inversion over the pouringvessel. Fig. 3 is a cross section of this vessel, taken on the lines 3,3, of Fig. 2. Fig. 4 is a similar cross section, taken on the lines 4,4;, of Fig. 2. Fig. 5 is a perspective view illustrating theconstruction of the air inlet tube.

The body of the coffee pot or pouring ves- Specification of LettersPatent.

Application filed December 21, 1911.

Patented Sept. 23, 1913.

Serial No. 667,147.

sel 1 is of any desired size and shape, provided with the pouring spout2 and the handle 3. The upper portion 4 of this vessel is cylindrical inshape, entirely open at the upper end, and there is preferably pro vidcdan annular head 5 at the base of this portion and a head (3 around theupper edge. The vessel 7 is a cylindrical vessel closed at one end andopen at the other, of a size to fit within the pouring vessel wheninverted and pushed down within the same. This vessel 7 is formed ofless diameter than the body of the vessel, at or near its upper portion,at 8, to leave an annular recess 9 with the upper edge expanded to thefull diameter of the vessel, and preferably provided with a head 10. Onthe inside of this cylindrical vessel 7 extending from the base of thecontracted portion nearly to the bottom of. the vessel at 12, is a tube13 formed triangular in shape as shown in Figs. 3 and 4; and inperspective in Fig. 5, one side of the tube being formed by thecylindrical wall of the vessel, and another side by a narrow wall ofuniform width l t, with the remaining side 15 gradually narrowing inwidth from top to bottom, so that the angle of this side 15 with theside wall of the vessel constantly increases from the top to the bottom,when the vessel is in the erect position illustrated in Fig. 2. The tubeis open at the bottom and opens through the wall of the vessel at 11. Onthe opposite side is formed another tube 16 which extends from the baseof the contracted portion partway down the side wall of the vessel onthe inside, just below the annular head 19, and this tube is providedwith openings 17 and 18 at each end through the wall of the vessel. Intothis vessel 7 the coffee and boiling water are placed and over the topof the vessel is stretched a strainer 20 of cloth or other suitablematerial. The coffee pot 1 is then inverted over the vessel 7 and pusheddown over the vessel. bringing the head 10 against the head 5 of thepouring vessel and locking the straining cloth in position between theseparts. After being'allowcd to stand for a short time, the entirecombination is then inverted, so that the coffee now drips through thestraining cloth into the body of the coffee pot. As the liquid flowsfrom the upper vessel, with the head 19 resting on the upper edge 6 ofthe lower vessel. air enters through the opening 18 and tube 16 into theannular tubes.

passageway 21 and thence through the opening at 11 into the tube 13 andout into the upper portion of the inverted vessel at 12. In this way,the formation of any vacuum in the inverted vessel is prevented. Someair will also pass from the pouring pot through the strainer 20 directinto the annular passage 21. I

When the boiling water is poured upon the coffee in the vessel 7 beforeit is inverted, the water also fills the tube 13 and unless provisionwere made for the discharge of this water, by reason of the narrowdiameter of the tube, the water would fail to drain oii when the vesselwas inverted, and thus the air inlet passageway would be stopped. Inorder to prevent this, the tube 13 is formed as described with one side15 having in its inverted position a gradually diminishing angle withthe side wall of the vessel. As the capillary attraction'increasesinversely as the angle between the two surfaces in contact, thiscapillary attraction draws the water in the tube 13 toward the smallerangle and also downwardly. Thus the liquid in the tube is drained ofl?readily, and tree passage for the entrance of air provided. Instead of atube triangular in cross section, a flattened tube with graduallydiminishing angles on opposite sides could be employed, and the sidescould be curved as well as flat, the essence of the construction beingthe change of the angle of the sides.

While 1 have illustrated the tubes 16 and 13 on opposite sides of thevessel 7 and the passage 21 formed between the two vessels when placedtogether as an annular passage, it will be evident that thecircumferential location of the tubes with reference to each other isnot of importance, and that the passage 21 need only extend between theIn fact, the tube 13, or a passage for air from the inside of the upperend, when inverted, of the vessel 7 to the lower end thereof openingoutside the vessel is the feature of prime importance, and the tube 16and passage 9 may be omitted without departing from the spirit of myinvention in its broad interpretation. With the tube 18 alone in someinstances, sufficient air can enter from the pouring vessel or aroundthe sides of the two vessels to prevent the formation of a vacuum duringthe dripping process.

The great advantage of my construction over any construction in which anair inlet is provided which is not automatic in its action, or which.requires a cap for the inlet passageway to be closedby hand when thevessel is used to receive the coffee and water and to be opened orremoved to permit the entrance of air when the vessel is inverted, isobvious.

With my construction, there is no danger of leakage when the water ispoured on the cones, and a heated cap does not have to be opened whenthe vessel is inverted.

With my construction, the container vessel, with the pouring vessel ontop, may be placed ,on the stove to keep hot, and ordinary boiled coiieemay be prepared with ground insteadot' pulverized cotlee, and the waterboiled on a stove in the usual way,

, and then the two vessels inverted to drain the coffee into the pouringvessel.

Having thus described my invention. what I claim as new and desire tosecure by Letters Patent, is: v

1. In a coffee pot, the combination with a pouring vessel, of acontainer for the coffee and water adapted to be inverted over andfitted within the pouring vessel, and a strainer for the invertedcontainer, the container provided with an air inlet for the passage ofair from a point inside of said container, at or near the closed end ofsaid 7 container, to a point outside of said container, at or near theopen. end of said container, the container provided with a recessoutside thereof connecting with said air inlet and forming a passagewaywith the wall of the pouring vessel.

2. In a coffee pot, the combination with a pouring vessel, of acontainer for the coffee and water adapted to be inverted over andfitted within the pouring vessel, and a strainer for the invertedcontainer, the container provided with an air inlet for the passage ofair from a point inside of said container, at or near the closed end ofsaid container, to a point outside ofsaid con tainer, at or near theopen end of said container, the container provided with a recess outsidethereof connecting withsaid air inlet and forming a passageway with thewall of the pouring vessel, and an air inlet for the containerconnecting said passageway with the outside of the assembled pot at apoint above the edge of the pouring vessel.

3. In a coffee pot, the combination with a pouring vessel, of acontainer for the coffee and water adapted to be inverted over and ttedwithin the pouring vessel, and strainer for the inverted container, thecon tainer provided with a recess around the outside thereof forming apassageway with thewall of the pouring vessel, and an air in. let tubefor the container opening through the wall thereof at each end andextending from said passageway to a point above the 4. In a coffee pot,the combination with a pouring vessel, of a container for the cofiee andwater adapted to be inverted over and fitted within the pouring vessel,and a strainer for the inverted container with the inverted end of thecontainer of less diameter than the pouring vessel to form a passagewaywith the wall of the pouring vessel, an outside air inlet for thecontainer opening through the wall thereof at each end, and extendingfrom the passageway to a point above the edge of the pouring vessel whenthe container is inverted thereon, with a second air tube for thecontainer opening into the passageway at one end and extending to andopening into the upper end of said container when inverted.

5. In a coffee pot, the combination with a pouring vessel, of acontainer for the coffee and water adapted to be inverted over andfitted within the pouring vessel, and a strainer for the invertedcontainer, the container provided with an air inlet tube for the passageof air from a point inside of said container, at or near the closed endof said container, to a point outside of said container, at or near theopen end of said container, said air inlet tube provided with wallsforming a gradually decreasing angle with each other from top to bottomto cause said tube to drain readily.

6. In a coffee pot, the combination with a pouring vessel, of acontainer for the coffee and water adapted to be inverted over andfitted within the pouring vessel, and a strainer for the invertedcontainer, the container provided with a recess on the outside thereofforming a passageway with the wall of the pouring vessel, and an airinlet tube for the container opening through the wall thereof at eachend and extending from said passageway to a point above the edge of thepouring vessel when the container is inverted thereon, with a second airtube for the container opening into the passageway at one end and at theother end extending to and opening into the upper end of said containerwhen inverted, said second inlet tube having walls presenting agradually decreasing angle with each other from top to bottom to causesaid tube to drain readily.

7. In a coffee pot, the combination with a pouring vessel, of acontainer for the coffee and water adapted to be inverted over andfitted within the pouring vessel, and a strainer for the invertedcontainer, said container provided with an air inlet tube at one endopening into the upper end thereof when inverted and at the other endopening through the wall of the container, said inlet tube beingtriangular in cross section, with two of the walls thereof forming agradually deereasing angle with each other from top to bottom to causesaid tube to drain readily.

8. In a coffee pot, the combination with a pouring vessel, of acontainer for the coffee and water adapted to be inverted over andfitted within the pouring vessel, and a strainer for the invertedcontainer, with the inverted end of the container of less diameter thanthe pouring vessel to form an annular passageway with the wall of thepouring vessel, an air inlet tube for the container opening through thewall thereof at each end, and extending from the annular passageway to apoint above the edge of the pouring vessel when the container isinverted thereon, with a second air tube for the container opening intothe annular passageway at one end and extending to and opening into theupper end of said container when inverted, said second inlet tube beingtriangular in cross section, with two of the walls thereof forming agradually decreas ing angle with each other from top to bot tom to causesaid tube to drain readily.

HERBERT L. JOHNSTON.

Attest:

R. \V. Dnwnlcse, J. F. Anna.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

